I don't think anyone's worried about getting killed by a bike, they're worried about getting hit and being hurt. I totally understand, since a lot of bikers ride like maniacs and don't seem to give a shit about the rules.
That said, I have observed that if they are a commuter with a helmet on, then they are likely to stop at lights and for pedestrians. If they have no helmet on, or are riding a citibike, then all bets are off and I should be very careful if they are heading my way.
This is helped enormously by 20mph speed limits around the city where I live. It means that at a busy junction in the city center, I can accelerate away and get up to traffic speed as quickly as a car, if not quicker.
A biker is a 60kg bag of meat coming at you with 15km per hour. They are completely silent and love riding on sidewalks.